1 /* Copyright 2019 The TensorFlow Authors. All Rights Reserved.
2 
3 Licensed under the Apache License, Version 2.0 (the "License");
4 you may not use this file except in compliance with the License.
5 You may obtain a copy of the License at
6 
7     http://www.apache.org/licenses/LICENSE-2.0
8 
9 Unless required by applicable law or agreed to in writing, software
10 distributed under the License is distributed on an "AS IS" BASIS,
11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 See the License for the specific language governing permissions and
13 limitations under the License.
14 ==============================================================================*/
15 #ifndef TENSORFLOW_CORE_KERNELS_LINALG_EINSUM_OP_H_
16 #define TENSORFLOW_CORE_KERNELS_LINALG_EINSUM_OP_H_
17 
18 #include "third_party/eigen3/unsupported/Eigen/CXX11/Tensor"
19 #include "tensorflow/core/framework/tensor_types.h"
20 
21 #if GOOGLE_CUDA || TENSORFLOW_USE_ROCM
22 #define EIGEN_USE_GPU
23 #endif  // GOOGLE_CUDA || TENSORFLOW_USE_ROCM
24 
25 namespace tensorflow {
26 namespace functor {
27 
28 template <typename Device, typename T, int N>
29 struct StrideFunctor {
operatorStrideFunctor30   void operator()(const Device& d, typename TTypes<T, N>::ConstTensor input,
31                   const Eigen::DSizes<Eigen::DenseIndex, N>& strides,
32                   typename TTypes<T, N>::Tensor output) {
33     output.device(d) = input.stride(strides);
34   }
35 };
36 
37 template <typename Device, typename T, int N>
38 struct InflateFunctor {
operatorInflateFunctor39   void operator()(const Device& d, typename TTypes<T, N>::ConstTensor input,
40                   const Eigen::DSizes<Eigen::DenseIndex, N>& strides,
41                   typename TTypes<T, N>::Tensor output) {
42     output.device(d) = input.inflate(strides);
43   }
44 };
45 }  // namespace functor
46 }  // namespace tensorflow
47 
48 #endif  // TENSORFLOW_CORE_KERNELS_EINSUM_OP_H_
49